CM 2350 injector question

[SquareOne]

Hello everyone! I've searched for quite awhile, but cannot seem to find what I'm looking for. Could someone explain the three sets of numbers on the injectors...

for ex. from CYL #1

1.) 2897320 - (all my injectors share this number, PN maybe?)
2.) 16012D201 - (varied through the 6 injectors, some similar though)
3.) GT0NEL6RR - (all 6 injectors very different)



....also, just to be clear, is it the number "zero" or the letter 'O'? I'm assuming whichever it is, means the other will never be used.

thank you all in advance!